Taxes on purchase orders

[Allan]

We have two taxes on all sales for BC PST 7% and GST 5%
We must pay GST 5% on all inventory from our suppliers which they must charge us on all purchase orders.
We then can submit the total GST 5% paid on all our purchases and we then charge our customers both taxes and submit both taxes to the government.
How do we get Taxes on our purchase orders?? 

[ronaldrwl]

There is not an option in the Purchase Order window to charge tax.